Abstract
We conducted bird surveys (breeding and wintering seasons) and vegetation surveys on thirty plots in secondary forests in Minami-Yamashiro area, Kyoto Prefecture, to determine the effects of vegetation factors on forest bird communities. We carried out regression analyses to evaluate the factors influencing the bird species richness for each season. The overall bird species richness became higher with the increase of the basal area in the breeding season, and so it did with the increase of the tree height in the wintering season. The factors that explained species richness of nesting-site guilds were the basal area for the canopy nesters; the tree height for the hole nesters; and the foliage height diversity for the ground nesters. Those of the forage-on-tree guild were the basal area in the breeding season and the tree height in the wintering season.
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